Watchmaker s tool



G. W. CAMERON.. WfAfIGHMAKERS TOOL.

Patented Dec. 13, 1892.

(No Model.)

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ATTORNEYS.

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W/TNESSES STATES PATENT EFICE.

GEORGE W. CAMERON, OF POPLAR BLUFF, MISSOURI.

WATCHMAKERS TOOL.

SPECIFICATION forming part of Letters Patent No. 487,988, dated December13, 1892.

Application filed April 6, 1892. Serial No. 427,994- (No model.)

To all whom t Wray concern:

Be it known that I, GEORGE W. CAMERON, of Poplar Blui, in the county ofButler and State of Missouri, have invented a new and ImprovedWatchmakers Tool, of which the following is afull, clear, and exactdescription.

The object of the invention is to provide a new and improved watchmakerstool which is simple and durable in construction and combines acalipersfor truingbalance-wheels, a beat-indicator, and a poising-tool.

The invention consists of certain parts and details and combinations ofthe same, as will be hereinafter described, and then pointed ont in theclaims.

Reference is to be had to the accompanying drawings, forming a part ofthis specilication, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure l is a side elevation of the improvement. Fig. 2 is an enlargedsectional side elevation of the same. Fig. 8 is a plan View of the same.Fig. 4 is a sectional plan view of the same on the line 4 4 of Fig. 2.Fig. 5 is a similar View ot' part of the same on the line 5 5 of Fig. 2.Fig. 6 is an inverted plan view of the movable sleeve, and Fig. '7 is asectional plan view ofthe fixed sleeve and its bearing on the line 7 7of Fig. 2.

The improved watchmakers tool is provided With a handle A, on one end ofwhich is secured or formed a fork B, having its arms B' and B2 curved,as plainly illustrated in Figs. l and 2, the end of the arm B'beingprovided with a bearing B2, and a similar bearing B4 is formed onthe end of the arm B2. In the bearing B is fitted to slide vertically asleeve O, formed at its lower end with a head C', preferablycone-shaped, as plainly illustrated in the drawings. In the sleeve O isformed an opening C2, engaged by the free end of a lever D, whichextends through a notch B5 in the bearing B2, as will be readilyunderstood by reference to Fig. 2.

The lever D is pivoted to one side of the arm B', and its Outer end ispivotally connected by a link D with a hand-lever E, also pivoted at E'to the arm B', the rear end of the said lever extending on top of thehandle A and is heldin a normal position by a spring E2, interposedbetween the handle of the lever E and the handle A. The upper end of thesleeve C is preferably provided with a screwthread, on which screws anut F, adapted to hold the sleeve in place while truing a balance-wheel,the said nut F abutting on the top of the bearing B3 when the lever E ispressed, and the sleeve slides downward into its lowermost position, forthe purpose mentioned.

Within the sleeve C is arranged a block G, provided at its bottom withajewel H, located directly opposite an opening O2, formed in the head C'of the sleeve O. On the block G is formed an upwardly-extending stem G',fitted to slide in a recess I', formed in a plug I, screwed in the upperend of the sleeve O. A springJ is coiled on the said stern G' and restswith its lower end on the block G and at its upper end abuts on theunder side of the plug I. The spring J serves to hold the block G seatedon the inside of the head C of the sleeve C; but the said spring permitsan upward sliding of the said block G, as hereinafter more fullydescribed.

Opposite the head O' of the sleeve O is arranged the head K of thesleeve K, held in the bearing B4 and secured therein by a nut F',screwing on the lower threaded end of the said sleeve K. In the head Kand directly opposite the opening O2 is formed an opening K2, leading tothe jewel N, held in the block L, fitted to slide in the sleeve K andadapted to be seated on the head thereof, as plainly illustrated in Fig2.

The block L is provided with a stem L,en gaging a recess O in the plugO, screwiugin the lower end of the sleeve K, as shown. A spring P iscoiled on the stem L' and abuts with its upper end on the block L andwith its lower end on the plug O. In one side of the aperture K2 in thehead K' is arranged a recess K3, adapted to -receive the roller, as lhereinafter more fully described.

On the head B is secured an arm R by means of a thumb-screw R', the saidarm extending into the opening between the fork arms B' and B2, and onthis arm is held adjustably the indicator-arm Q, arranged in line withthe space between the two heads C and K'. The indicator-arm Q is heldlongitudinally adjustable on the arm R by means IOO of a set-screw Q,screwing in the arm R and passing through a longitudinal slot in thesaid indicator-arm Q.

When the several parts are in the position shown in Figs. l and 2, thenthe springs J and P hold the blocks G and L on their seats in the headsC and K respectively. Now when it is desired to use the tool as acalipers the operator loosens the nut F, so that the balance will passinto position as in an ordinary calipers. The nut F is adjusted so thatthe balance will move freely without much friction, it being understoodthat the ends of the staff of the balance pass through the openings C3and K2 to be engaged by the jewels H and N.

into the proper position. presses the handle end of the lever E, so thata downward motion is given t-o the sleeve C, whereby the balance orwheel is held rigidly between the faces of the heads C and K. By thisdownward movement of the sleeve C the blocks G and L,carrying the jewelsH and N, respectively, give sufficiently to permit the heads C and K toengage the opposite sides of the balance-wheel. The operator can nowbend the balance as desired, and when finished the pressure on thehandle of the lever E is released, so that the balance will resume itsposition under the indicatorarm Q.

To use the tool for beat block or indicator for retaining position ofroller and hair-spring upon staff of balance-wheel after they have beenremoved from the same, the balance is placed upon the heads Cand K, asinordinary calipers, but with the hair-spring and rollertable onthe head Kand the lroller-jewel inthe recess K3. The operatorthen loosens the nutF and turns the sleeve K until the hairspring stud is directly under theindicatorarm Q, and then tightens nut F to hold sleeve K in the desiredposition. The operator then takes out the balance, removes thehair-spring and roller, and then places balance in tool and proceeds totrue up, as before described. To replace the roller and the spring, theroller is put in position on the face of the head K', then the balanceis inserted and the lever E lis depressed, so that the roller is forcedinto The operator then adjustsV the indicator-arm Q, so as to bring thesannel The operator now' position on the staff. The hair-spring is thenplaced upon the staff with the hair-spring stud directly under theindicator-arm Q, after which the operator presses the handle of thelever E, so that the haii-spring is forced in position on the staff andthebalance is on beat.

In order to use the device as a poise-tool, the balance is placed in thetool with the roller and hair-spring removed. The nut F is then adjustedso that there is no pressure on the pivots. Then the tool is turned soas to rest upon the eXtreme ends of handles and the thumb-screw R',after which the balance is adjusted to the poise.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- 1. The combination, with the tool-handle vandits fork B, having tubular bearings, a

sleeve K, held in the lower bearing, and a spring-slidingblock andscrew-plug contained in said sleeve, of a sliding sleeve C, fitted inthe upper bearing, a sliding block, spring, and screw-th readed plugwhich are carried by such sleeve, the plug serving to adjust the tensionof the spring without changing the position of the block, and the levermechanism applied to the fork and serving to positively adjust thesliding sleeve and its contained parts up or down, as shown anddescribed.

2. The combination, with the tool-handle, its fork and a threaded sleeveK, held in the lower bearing, the jewel-block, spring, and screw-plu gcarried by this sleeve, anda nut F', applied to the latter for clampingit in place, of a sliding threaded sleeve C, carried by the upperbearing, the jewel-block and spring contained in such sleeve C, and ascrew-plug which serves to adjust the tension of the spring withoutchanging the position of the jewel-block, a nut F, applied to saidsleeve and serving as a stop to limit its downward movement, and levermechanism applied to the handle and fork and adapted to positivelyadjust the sliding sleeve, substantially as shown and described.

GEORGE CAMERON.

